We had the same problem with the whole house--live in Tucson--AC maxed out and the inside temp was around 90. We changed all the windows in the house to double pane and I made block out drapes with that rubberized layer over the windows that get the sun. It is amazing how the temp changes when the drape is put down when sun shines in--only issue it blocks out the light. We had problems with black mold with swamp coolers, so be watchful if you use a evap method of cooling. Good luck--the heat is really miserable and it also dry rots all the wood in your house.